The correct combination is TLS for data in transit, AES-256 for data at rest, and AWS CloudTrail for auditing. This triad directly addresses the core security requirements because TLS (Transport Layer Security) encrypts the communication channel to prevent interception during transmission, AES-256 provides the industry-standard symmetric encryption for stored data, and CloudTrail logs all API-level access to create an immutable audit trail. On the CompTIA AI+ AI0-001 exam, this question tests your ability to map specific security controls to the three distinct pillars of encryption at rest, encryption in transit, and audit logging—a common trap is confusing TLS with SSL or selecting a database-level audit tool instead of an API-level service like CloudTrail. Remember the mnemonic: “TLS for travel, AES for archive, CloudTrail for the trail.”
AI0-001 AI Models and Data Engineering Practice Question
This AI0-001 practice question tests your understanding of ai models and data engineering. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An organization needs to store sensitive customer data for training a machine learning model. The data must be encrypted at rest and in transit, and access must be audited. Which combination of practices should be implemented?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use TLS for transfer, AES-256 for storage, and AWS CloudTrail for auditing
Option A is correct because it combines TLS (Transport Layer Security) for encrypting data in transit, AES-256 for strong encryption at rest, and AWS CloudTrail for auditing API-level access. TLS ensures confidentiality and integrity during transmission, AES-256 provides robust symmetric encryption for stored data, and CloudTrail logs all AWS API calls for compliance and audit trails. This triad satisfies the requirements of encryption in transit, at rest, and audited access.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Use TLS for transfer, AES-256 for storage, and AWS CloudTrail for auditing
Why this is correct
These provide encryption and auditing.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use FTP for transfer, AES-128 for storage, and manual log review
Use SSH for transfer, store data in a database, and enable access logs
Why it's wrong here
SSH encrypts but database storage may not be encrypted.
✗
Use MD5 for hashing, store data in plaintext, and enable server logs
Why it's wrong here
MD5 is not encryption and plaintext is insecure.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the distinction between encryption (AES) and hashing (MD5), and the requirement for both in-transit and at-rest encryption, leading candidates to confuse SSH or FTP with proper TLS-based encryption.
Detailed technical explanation
How to think about this question
TLS 1.2/1.3 uses a handshake to negotiate cipher suites and exchange keys, ensuring forward secrecy with ephemeral Diffie-Hellman. AES-256 is a symmetric block cipher with a 256-bit key, requiring 2^256 brute-force attempts, making it resistant to quantum attacks with Grover's algorithm. AWS CloudTrail records all management and data events, including who accessed the data and when, with logs stored in S3 and optionally encrypted with SSE-KMS for additional security.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
AI Models and Data Engineering — This question tests AI Models and Data Engineering — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use TLS for transfer, AES-256 for storage, and AWS CloudTrail for auditing — Option A is correct because it combines TLS (Transport Layer Security) for encrypting data in transit, AES-256 for strong encryption at rest, and AWS CloudTrail for auditing API-level access. TLS ensures confidentiality and integrity during transmission, AES-256 provides robust symmetric encryption for stored data, and CloudTrail logs all AWS API calls for compliance and audit trails. This triad satisfies the requirements of encryption in transit, at rest, and audited access.
What should I do if I get this AI0-001 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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